I’ve been using the DS18B20 for a while now, but wanted something with a higher temperature range and faster update rate, but with a similar digital interface. After a lot of searching, it became clear that there are very, very few parts that fit these requirements…<\/p>\n
Finally, I found a neat sensor called the TSIC 306<\/a>. This has a temperature range of -50 \u00b0C to +150 \u00b0C and the update rate is a very respectable 10Hz. Better still, it’s available in a 3-wire TO92 package, similar to the DS18B20. It has one small disadvantage: it looks as if you can only have one device on the bus, so each sensor will need a dedicated GPIO pin. That said, it still looks ideal to upgrade the sensors in my coffee machine<\/a>, so here goes!<\/p>\n The hardware interface to the Pi is very straightforward: it can accept 3V3 power, and the data line is actively driven low\/high, so it can be wired directly to a GPIO line with no pull up resistor. However, it’s worth noting that the data suggests that 5V supply yields better measurement accuracy, so it may be preferable to power from 5V and use two resistors as a potential divider to reduce the data output to 3V3 logic levels for the Pi.<\/p>\n To date I have managed to read the sensor from C++ on the Pi, but it’s a little unreliable as it’s difficult to get accurate timing from user mode. It looks like a Kernel Driver may be needed…<\/p>\n","protected":false},"excerpt":{"rendered":" I’ve been using the DS18B20 for a while now, but wanted something with a higher temperature range and faster update rate, but with a similar digital interface. After a lot of searching, it became clear that there are very, very few parts that fit these requirements… Finally, I found a neat sensor called the TSIC … Continue reading Temperature Sensor Upgrade: the TSIC 306<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"_links":{"self":[{"href":"https:\/\/int03.co.uk\/blog\/wp-json\/wp\/v2\/posts\/114"}],"collection":[{"href":"https:\/\/int03.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/int03.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/int03.co.uk\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/int03.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=114"}],"version-history":[{"count":2,"href":"https:\/\/int03.co.uk\/blog\/wp-json\/wp\/v2\/posts\/114\/revisions"}],"predecessor-version":[{"id":644,"href":"https:\/\/int03.co.uk\/blog\/wp-json\/wp\/v2\/posts\/114\/revisions\/644"}],"wp:attachment":[{"href":"https:\/\/int03.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/int03.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/int03.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}